Ferrocolumbite
      Tarantino S C, Zema M
      American Mineralogist 90 (2005) 1291-1300
      Mixing and ordering behavior in manganocolumbite-ferrocolumbite solid solution:
      A single-crystal X-ray diffraction study
      Sample: BRA n18 Qm=0.752 from S. Jose de Safira, Minas Gerais, Brazil
      Sample: Annealed at T = 700 C for t = 5 m
      Note: Occupancies calculated assuming complete Fe/Mn disorder
      _database_code_amcsd 0003834

      CELL PARAMETERS:   14.2600   5.7293   5.0746   90.000   90.000   90.000
      SPACE GROUP: Pbcn      
      X-RAY WAVELENGTH:     1.541838
      Cell Volume:    414.594
      Density (g/cm3):      5.551
      MAX. ABS. INTENSITY / VOLUME**2:      125.8719972    
      RIR:      7.384
      RIR based on corundum from Acta Crystallographica A38 (1982) 733-739
               2-THETA      INTENSITY    D-SPACING   H   K   L   Multiplicity
                12.41          2.77        7.1300    2   0   0         2
                24.25          4.68        3.6707    1   1   1         8
                24.33         27.12        3.6582    3   1   0         4
                24.98          2.38        3.5650    4   0   0         2
                30.11        100.00        2.9675    3   1   1         8
                31.22          8.97        2.8647    0   2   0         2
                35.38         13.55        2.5373    0   0   2         2
                36.00         14.77        2.4946    0   2   1         4
                37.85          6.83        2.3767    6   0   0         2
                40.29          2.81        2.2384    3   0   2         4
                40.85          5.25        2.2089    3   2   1         8
                43.40          8.23        2.0849    3   1   2         8
                47.89          6.52        1.8994    0   2   2         4
                49.86          5.93        1.8291    6   2   0         4
                50.86          1.21        1.7953    7   1   1         8
                51.57         13.28        1.7721    3   3   0         4
                52.78         16.14        1.7346    6   0   2         4
                53.23         21.33        1.7207    6   2   1         8
                60.28         13.34        1.5353    3   1   3         8
                62.61          4.64        1.4838    6   2   2         8
                63.63         10.98        1.4623    9   1   1         8
                63.91          7.71        1.4566    0   2   3         4
                64.10         12.10        1.4528    3   3   2         8
                68.01          5.22        1.3785    0   4   1         4
                72.20          2.04        1.3084    9   1   2         8
                74.84          1.48        1.2687    0   0   4         2
                76.74          2.11        1.2419    6   2   3         8
                78.43          2.82        1.2194    9   3   0         4
                80.06          1.22        1.1986    3   1   4         8
                80.56          5.38        1.1924    6   4   1         8
                80.89          2.19        1.1883   12   0   0         2
                83.30          1.09        1.1600    0   2   4         4
                85.70          3.57        1.1335    9   1   3         8
                87.07          3.18        1.1192    6   0   4         4
                87.59          1.27        1.1140    3   5   0         4
                89.08          4.83        1.0991    9   3   2         8
                89.70          1.97        1.0931    0   4   3         4
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       XPOW Copyright 1993 Bob Downs, Ranjini Swaminathan and Kurt Bartelmehs
  For reference, see Downs et al. (1993) American Mineralogist 78, 1104-1107.